Learn how to read bearing markings, decode part numbers, and identify specifications so you can accurately value and sell your surplus bearings.
Where to Find Bearing Markings
Accurately identifying your bearings is essential to getting a fair price for surplus inventory. Fortunately, most industrial bearings carry clear markings that reveal the manufacturer, part number, and key specifications. These markings are typically laser-etched or stamped on the side face of the bearing's outer ring, and sometimes on the inner ring as well. With a little knowledge, you can decode this information yourself.
Start by cleaning the bearing face gently so the markings are legible, then look for two key pieces of information: the brand name or logo, and the alphanumeric part number. Brand identification is usually obvious — SKF, FAG, Timken, NSK, NTN, and others print their names clearly. The part number is the alphanumeric code that defines the exact bearing.
Decoding the Part Number
Bearing part numbers follow systematic conventions, though they vary by manufacturer. Generally, the number encodes the bearing type, bore size, series (which relates to load capacity and dimensions), and suffixes that indicate features like seals, shields, cage material, or precision class. For example, in many systems the last two digits of a basic number, multiplied by five, give the bore diameter in millimeters for common sizes. Suffixes such as 2RS or ZZ indicate sealed or shielded variants.
You don't need to memorize every convention to sell bearings successfully. Simply recording the full part number exactly as it appears, including all letters and suffixes, gives a buyer everything they need to identify and value the bearing precisely. When in doubt, photograph the markings clearly.
Why Accurate Identification Pays Off
Accurate identification directly affects how much you get paid. A buyer can only offer a precise price when they know exactly what a bearing is. Vague descriptions lead to conservative offers, while complete part numbers allow a buyer to match your inventory to real market demand and pay accordingly. Taking the time to record and photograph markings is one of the simplest ways to maximize your return.
If you have bearings you cannot identify, don't worry — experienced buyers can often recognize them from photographs or dimensions. At Bearing Buyers, we're happy to help with identification as part of providing an accurate quote.
If you have surplus bearings to sell, contact Bearing Buyers for a free, no-obligation cash quote. We buy new and used bearings of every major brand in all 50 states, pay top dollar, and cover all pickup and shipping costs.